For replication of Wasow, Omar, 2020, "Agenda Seeding: How 1960s Black Protests Moved Elites, Public Opinion and Voting," American Political Science Review.

Download Electoral Data for Counties in the United States: Presidential and Congressional Races, 1840-1972 (ICPSR 8611) from:
https://www.icpsr.umich.edu/icpsrweb/ICPSR/studies/8611

Paths for replication:
data/ICPSR_08611/dvnDataFile_509482.RData

Data citation:
Clubb, Jerome M., Flanigan, William H., and Zingale, Nancy H. Electoral Data for Counties in the United States: Presidential and Congressional Races, 1840-1972. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2006-11-13. https://doi.org/10.3886/ICPSR08611.v1